(CNN) - She's still ahead of the competition, but a new poll in an important presidential battleground state indicates that Hillary Clinton's numbers have slightly deteriorated over the past couple of months.

According to a Quinnipiac University survey of Ohio voters, Clinton remains in the lead over eight potential Republican opponents in hypothetical 2016 presidential election showdowns, but her margins have shrunk.

This as a new White House report indicated that Rubio's home state of Florida is one of the most vulnerable to rising sea levels.

"I do not believe that human activity is causing these dramatic changes to our climate the way these scientists are portraying it," the first term senator said Sunday on ABC "This Week," after being asked by ABC News' Jon Karl whether humans were contributing to the heating up of the planet.

Washington (CNN) - With six months to go until November's midterm elections, new national polling suggests that Republicans have the edge over Democrats in the battle for Congress.

A USA Today/Pew Research Center survey indicates that the GOP's advantage is due in part to an uneven economic recovery, an unpopular national health care law, and President Barack Obama's lackluster standing among Americans.

(CNN) - Jeb Bush has a wide lead over other potential 2016 Republican White House contenders in the battle in Florida for GOP presidential nomination, according to a new poll of Sunshine State voters.

But a Quinnipiac University survey released Thursday also indicates Hillary Clinton topping the former two-term Florida governor in a hypothetical 2016 general election showdown in the nation's most populous swing state.

(CNN) - The vast majority of Americans say Vladimir Putin's not honest or trustworthy, but according to a new national poll they don't compare the Russian president's actions in Ukraine with the land grabs in the years leading up to World War II by Germany's Adolf Hitler.

A Quinnipiac University survey released Wednesday indicates that only 24% of the public equates Putin's annexing last month of neighboring Ukraine's Crimea peninsula with Hitler's actions, with 51% saying that's too strong a comparison. Just over one in five admitted they don't know enough about pre-Second World War history to answer the question.

(CNN) – With over a decade running New York City, former Mayor Michael Bloomberg’s tenure is considered "mainly a success" by voters in the Big Apple, according to a national survey released Friday.

Sixty-four percent of voters in the Quinnipiac University poll said Bloomberg's 12-year stint as mayor was a success, compared to 24% who did not. Seventy-eight percent of Republicans see the former mayor's time in office as favorable, compared to 62% of Democrats and 68% of Independents.

(CNN) - A national survey released Tuesday shows just over half of Americans are looking forward to this fall's congressional elections, and indicates Republicans are more excited to head to the polls in November than Democrats.

As campaigning picks up in the new year for the midterm elections, the Pew Research Center survey shows 63% of Republicans are anticipating the congressional elections, compared to 53% of Democrats. Fifty-one percent of all respondents said they are "especially looking forward to" the elections, with 49% saying they are not.FULL POST